Impact of a Mobile App-Based Waitlist Intervention on Readiness for Eating Disorder Treatment

The goal of this randomized controlled trial is to evaluate whether a mobile app-based motivational interviewing intervention (MI-Coach: ED) can improve motivation and readiness for treatment in adults with eating disorders who are currently on waitlists for provincially funded eating disorder services in British Columbia. The main questions it aims to answer are: * Does the use of MI-Coach: ED improve overall motivation, confidence, and readiness for treatment compared to treatment-as-usual (waitlist with no intervention)? * Does the app help mitigate declines in motivation over time among waitlisted individuals? Researchers will compare participants using the MI-Coach: ED app to a delayed treatment control group to assess differences in motivation, readiness for treatment, and associated clinical outcomes. Participants will: * Treatment group: Use the MI-Coach: ED app for four weeks, completing interactive modules focused on motivation and readiness for change, while also completing weekly brief assessments of motivation. * Delayed treatment group: Remain on the waitlist with no intervention for four weeks while completing weekly brief assessments of motivation. After this period, they will receive access to the MI-Coach: ED app and be integrated into the treatment group. * Complete pre-test and post-test questionnaires at 0, 4, 8, and 12 weeks assessing motivation, eating pathology, anxiety, and depressive symptoms. This study aims to inform evidence-based practices for reducing the adverse effects of long waitlist durations on individuals with eating disorders.